Design And Implementation Of Information Acquisition System Bsaed On NB-IOT

With the advent of the third wave of information,IoT technology has developed rapidly and been used widely.The applications of IoT have gradually penetrated into all walks of life.However,power consumption,network coverage,communication distance and other factors seriously restrict the development of IoT applications.Under this condition,LPWAN technology comes into being.LPWAN technology meets the requirements of low power consumption and wide coverage at the cost of transmission rate.With the advantages of technical maturity,wide deployment of commercial networks and high security,NB-IoT emerages among LPWAN technologies.This paper takes temperature and humidity as the main acquisition object,and designs and implements an information acquisition system based on NB-IoT for long-distance,low-speed and low-delay-sensitive application scenarios.The main contents of this paper are as follows:1.The functional requirements are analyzed and the overall scheme of the system is designed.The system consists of terminal,NB-IoT network,IoT cloud platform and Web application software.2.The terminal hardware circuit is designed and implemented with modular design idea.The terminal hardware circuit mainly includes the main controller module based on MSP430 microprocessor,NB-IoT wireless communication module based on BC95 module and power module.3.The system software platform is designed and implemented,including terminal embedded software,IoT cloud platform and Web application software.Embedded terminal software mainly realizes acquisition and reporting of temperature and humidity and receiving and execution of command.As the communication bridge of the system,the IoT cloud platform receives the data from the terminal and pushes it to the Web application software.At the same time,it receives the commands from the Web application software and sends them to the terminal.The Web application software mainly realizes the visual display of temperature and humidity and the control of the collection period.4.The hardware platform and software platform are debugged and tested together.The test results show that the system can realize the periodic acquisition of temperature and humidity and the remote control of acquisition cycle under the premise of low power consumption.The system runs well and meets the design requirements.